What May feels like in Philadelphia
May is late spring in Philadelphia. Daytime temperatures are mild — neither cold nor hot for walking around. Evenings bring a clear drop in temperature, and nights are cool. Humidity is on the high side, but mild temperatures keep it comfortable.
Rain in Philadelphia in May
It is a changeable month: rain comes about one day in 3, with dry spells in between. Wet days average about 8.9 mm (0.4 in), enough to soak you without an umbrella. The yearly figure is similar, around 9.7 mm per wet day.
Daylight and sunshine in May
Mid-month, Philadelphia gets 14 h 21 min of daylight, from sunrise near 5:46 am to sunset near 8:07 pm. The days are stretching out — 1 h 8 min more daylight than mid-April. Measured sunshine covers about 70% of the daylight — there are plenty of bright spells.
How May compares to the rest of the year
May is the 5th warmest month of the year in Philadelphia. Afternoons run 5.3°C (9.5°F) warmer than in April, with 3 mm less rain. Temperatures keep climbing into June. The next month's average high: 27.7°C (81.9°F).
Who May suits
- Sightseeing: a good fit — daytime temperatures are fine for walking around.
- Parks & outdoor: a good fit — good conditions for sitting outside.
Tips for visiting Philadelphia in May
Versatile Layers
Pack pieces you can take off by noon and put back on at dusk.
Rain Protection
A compact umbrella and a light waterproof jacket.
Sunglasses
Frequent sunshine — sunglasses and a light hat.
Quick questions
How warm is Philadelphia in May?
Expect around 22.8°C (73°F) in the afternoon and 12.6°C (54.7°F) at night, which most visitors would call mild.
Does it rain a lot in Philadelphia in May?
Yes, fairly — rain falls about one day in 3 and totals about 98 mm, so an umbrella is worth carrying.
What should I wear in Philadelphia in May?
The numbers point to versatile layers, rain protection and sunglasses. Add a layer for after dark.
Is May or June better for visiting Philadelphia?
On our 12-month climate ranking, May comes out ahead (#5 of 12 vs #8). June is warmer and has more rainy days.